Knies (upper body) was labeled day-to-day by head coach Craig Berube but doesn't have a clear timeline to return, David Alter of The Hockey News reports Friday.
Knies should probably be considered a long shot to play in Saturday's matchup with Ottawa at this point. Prior to getting hurt, the 22-year-old winger managed four points over his last three outings while averaging 17:24 of ice time. With Knies on the shelf, Bobby McMann looks poised to take a first-line role alongside Auston Matthews and Mitch Marner.